definition for mole
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mole hydatid mole , hydatidiform mole an abnormal pregnancy characterized by placental abnormality involving swollen chorionic villi, which form a large, grapelike mass of vesicles, by trophoblastic hyperplasia, and by loss of fetal blood vessels in the villi.
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Plasma proteins Plasma Proteins 2. Plasma Proteins(Cont.) The plasma is the liquid medium of the blood(55-60%),in which the cell components namely erythrocytes,leukocytes,platelets and many proteins are suspended. Plasma – clotting factors=Serum Total concentration of plasma protein in blood is 7g/dl, which in total makes 7% of total blood volume.
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NPL's guide to the mole (mol) The mole is the SI base unit that measures amount of substance. The symbol for amount of substance is n. By definition, the mole contains a defined number of entities (usually atoms or molecules). This number is called 'the Avogadro constant' (N A). The mole is used to describe a practical quantity of material.
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- A mole is defined as the number of atoms in exactly 12 grams of C (carbon twelve). The number is called Avogadro's Number. In the above definition, 12 is the mass number of carbon. So, one mole of carbon atoms has a mass of 12 grams. The relative atomic mass, which can be written as Ar or RAM, is the number just above the element in the periodic table (have a look, and check that carbon is 12).
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Mole (animal) Mole (animal) Moles are small mammals adapted to a subterranean lifestyle (i.e., fossorial). They have cylindrical bodies, velvety fur, very small, inconspicuous ears and eyes,[1] reduced hindlimbs and short, powerful forelimbs with large paws adapted for digging.
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What Is Mole Day? - Date and How to Celebrate Avogadro's number is the number of particles in a mole of a substance. Mole Day is an unofficial chemistry holiday celebrated on a date that relates to Avogadro's number, which is approximately 6.02 x 10 23. The purpose of Mole Day is to foster an interest in chemistry.
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mole hydatid mole, hydatidiform mole. a condition in females characterized by an abnormal pregnancy resulting from a pathological ovum, with proliferation of the epithelial covering of the chorionic villi and dissolution and cystic cavitation of the avascular stroma of the villi. It results in a mass of cysts resembling a bunch of grapes. pigmented mole
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Understanding the Mole Unit of Measurement Like all units, a mole has to be based on something reproducible. A mole is the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro's Number, which is roughly 6.02x10 23. A mole of carbon atoms is 6.02x10 23 carbon atoms. A mole of chemistry teachers is 6.02x10 23 chemistry teachers. It's a lot easier to write the word 'mole' than to write '6.02x10 23 ' anytime you want to refer to a large number of things! Basically, that's why this particular unit was invented.
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Amount of substance The International System of Units (SI) defines the amount of substance to be proportional to the number of elementary entities present. The SI unit for amount of substance is the mole. It has the unit symbol mol. The mole is defined as the amount of substance that contains an equal number of elementary entities as there are atoms in 12 g of the isotope carbon-12. This number is called Avogadro's number and has the value 7023602214085700000♠6.022140857(74)×1023.
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mole A rare form of gestational trophoblastic disease in which there is overproduction of chorionic villi normally destined to develop into the placenta. A partial mole is characterized by an abnormal placenta and some fetal development; a complete mole, by an abnormal placenta and no fetal development.
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- Simply put, the mole represents a number. Just as the term dozen refers to the number twelve, the mole represents the number 6.02 x 1023. (If you're confused by the form of this number refer to our The Metric System module). Now that's a big number!
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Understanding the Mole Unit of Measurement A mole of carbon atoms is 6.02x1023 carbon atoms. A mole of chemistry teachers is 6.02x1023 chemistry teachers. It's a lot easier to write the word 'mole' than to write '6.02x1023' anytime you want to refer to a large number of things! Basically, that's why this particular unit was invented.
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The Mole and Atomic Mass This module introduces the mole, a unit of measurement for quantifying atoms and molecules. The module describes 19th century developments that led to the concept of the mole, also known as Avogadro’s number, or 6.02 x 1023. Molar mass is explained, and examples of mole/weight relationships are presented.
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- The mole fraction x i {\displaystyle x_{i}} is defined as the amount of a constituent n i {\displaystyle n_{i}} (in moles) divided by the total amount of all constituents in a mixture n t o t {\displaystyle n_{\mathrm {tot} }} :
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Precancerous Skin Lesions and Skin Cancer Slideshow A mole (nevus) is a benign growth of melanocytes, cells that gives skin its color. Although very few moles become cancer, abnormal or atypical moles can develop into melanoma over time. Normal moles can appear flat or raised or may begin flat and become raised over time. The surface is typically smooth.
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- 4 Chapter 3 7 The Mole •The mole (mol and abbreviated n) is a unit of measure that allows us to make comparisons between substances that have different masses• A mole is Avogadro’s number of atoms, that is 6.022 ×10 23 atoms.
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The mole is used extensively in chemistry, why not elsewhere? The mole is useful in chemistry because it relates two popular but inconsistent units of mass - the atomic mass unit (u) and the gram. One mole of atoms of an element with atomic mass x u, has a mass of x grams. We don't use atomic mass units outside chemistry, so we also have no need for the mole.
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molest molest-harass or assault sexually; make indecent advances to. assail, assault, set on, attack-attack someone physically or emotionally; The mugger assaulted the woman; Nightmares assailed him regularly.
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2018 ICD-10-CM Diagnosis Code D22.9 (nee-vus) a benign growth on the skin, such as a mole. A mole is a cluster of melanocytes and surrounding supportive tissue that usually appears as a tan, brown, or flesh-colored spot on the skin. The plural of nevus is nevi (nee-vye).
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SI base unit Definitions of the SI base units. 1. The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is mol..
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- mole fraction The ratio of the number of moles of one component in a mixture to the total number of moles. mole The SI base unit for the amount of a substance; the amount of substance that contains as many elementary entities as there are atoms in 0.012 kg of carbon-12.
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Understanding the Mole Unit of Measurement A mole is simply a unit of measurement. Units are invented when existing units are inadequate. Chemical reactions often take place at levels where using grams wouldn't make sense, yet using absolute numbers of atoms/molecules/ions would be confusing, too. Like all units, a mole has to be based on something reproducible. A mole is the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro's Number, which is roughly 6.02x1023. A mole of carbon atoms is 6.02x1023 carbon atoms.
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Units and dimensions in chemistry Of special interest to Chemistry is the mole, the base unit for expressing the quantity of matter. Although the number is not explicitly mentioned in the official definition, chemists define the mole as Avogadro’s number (approximately 6.021023) of anything.
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- A mole is the amount of matter that has a mass in grams equal to the atomic mass in amu of the atoms. Thus, a mole of carbon has a mass of 12 grams. The number of atoms in a mole is called the Avogadro number, Nav = 6.023  1023. Note that Nav = 1 gram/1 amu. Calculating n, the number of atoms per cm3 in a piece of material of density d (g/cm3).
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- a skin mole is a spot on the skin that is usually round or oval in shape the skin mole can be small or large and it may range in color from pink brown red or black a single mole is referred to in medical terms as a nevus when one is discussing moles in the plural form they are called neviaised skin mole flat skin mole a skin mole may be flat or raised and can sometimes sprout a few hairs a raised mole liquid nitrogen may be used to remove a skin moles through a process called cryosurgery
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mole The mole is of interest primarily to chemists and physicists. Sometimes, larger or smaller units are defined by attaching power-of-10 prefix multiplier s. For example, a kilomole (1 kmol) is 10 3 mol, or approximately 6.022169 x 10 26, and a millimole (1 mmol) is 10 -3 mol, or approximately 6.022169 x 10 20.